Eastman Chemical Company

Grupo Petrotemex S.a. De C.v.

Westlake Longview Corporation

Robert Lin

Marcel De Vreede

Kenny Randolph Parker

Alan George Wonders

Philip Edward Gibson

Lee R Partin

Wayne Scott Strasser

Ruairi Seosamh O'Meadhra

Ronald Buford Sheppard

Thomas Earl Woodruff

Robert Thomas Hembre

Brent Alan Tennant

Duane Alan Hall

Charles Edwan Sumner, Jr

Kenneth Alan Dooley

Paul Keith Scherrer

Timothy Alan Upshaw

Thomas Michael Pell, Jr

Mark Robert Shelton

Bailey James Salmon

Edwin Franklin Holcombe, Iii

Matthew Howard Scott

Mark Dewayne Lorenz

David Lynn Meade

Dwayne Ray Leonard

Shane Kipley Kirk

Bruce L Gustafson

Robert Jacks Sharpe

Steven Paul Bellner

Michael John Rodig

Martin De Boer

Casey Lynn Elkins

Jody Lee Rodgers

Brian David McMurray

Eric Jackson Fugate

Scott Owens

Ernest William Arnold, Iii

Raymond Isaac

Johannes Wilhelmus Sluijmers

Leigh A Alexander

Harold David Miller, Jr

Mark Dwayne Lorenz

Sunday O Ogundiran

James F McGehee

Lee Reynolds Partin

The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

Regioselectively substituted cellulose esters

Disclosed is a method for forming enals from corresponding alehydes in a single enclosed unit such as a divided wall reaction distillation unit. The method of the present invention includes (a) feeding an aldehyde feed stream comprising at least one aldehyde reactant into a reaction zone contained within said single enclosed unit; (b) reacting said at least one aldehyde reactant in said reaction zone in the presence of a catalyst to form an enal-containing reaction zone effluent comprising an enal; (c) purifying said enal-containing reaction zone effluent in a first separation zone within said single enclosed unit to form an enal-rich product mixture and a residual unreacted aldehyde mixture; and (d) collecting from said single enclosed unit at least a portion of said enal-rich product mixture. The method of the present invention results in high enal yields at a markedly reduced capital cost and energy consumption as compared to prior art processes.

Method for catalytic production of refined enal products from an aldehyde feed stream using a single enclosed unit

Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.

Optimized liquid-phase oxidation

A process and apparatus for gas phase polymerization of olefins in a fluidized bed reactor are disclosed. The process and apparatus employ a vertically oriented fines ejector in order to reduce fouling and reactor downtime.

Process and apparatus for olefin polymerization in a fluidized bed reactor

Disclosed is an optimized process and apparatus for more efficiently producing aromatic dicarboxylic acids (e.g., terephthalic acid). In one embodiment the process/apparatus reduces costs by recovering and purifying residual terephthalic acid present in the liquid phase of an initial oxidation slurry. In another embodiment the process apparatus reduces costs associated with hydrogenation by forming a final composite product containing unhydrogenated acid particles.

Optimized production of aromatic dicarboxylic acids

A process and apparatus which reduces the fines in a liquid discharge stream and/or increases the dryness of a solids discharge stream while under a pressure equal to or greater than the vapor pressure of the liquid. There is provided a process for separating particles such as polyethylene terephthalate or polyethylene naphthalate from a liquid in a slurry comprising feeding a slurry comprising solid particles and a liquid into a separation zone maintained at a pressure equal to or greater than the vapor pressure of the liquid; contacting the slurry in the separation zone with a porous filter; and separating liquid from the particles, wherein the liquid flows through the filter into an outer annulus defined as a space between a wall of the separation device and the filter, said porous filter having a terminal point beyond which the separated liquid does not pass from the outer annulus back through the filter; accumulating no liquid in the outer annulus or accumulating liquid in the outer annulus at a level below the terminal point, and continuously discharging the separated liquid form the outer annulus through a liquid outlet; and decoupling the particles from the separation zone through an outlet at a low pressure below the vapor pressure of the liquid at the liquid temperature within the separation zone, while maintaining a pressure on the particles prior to decoupling at or above the vapor pressure of the liquid within the separation zone.

Crystallized pellet/liquid separator

Disclosed is an optimized process and apparatus for more efficiently producing and purifying aromatic dicarboxylic acids (e.g., terephthalic acid). The optimized system employs at least one zoned slurry concentrator to enhance purification of the aromatic dicarboxylic acid.

The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethylene glycol mixture suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product without isolation of a substantially dry terephthalic acid solid.

Process for production of a carboxylic acid/diol mixture suitable for use in polyester production

Growing community of inventors

Kingsport, TN, United States of America

Robert Lin